package org.mindrive.system.config;

import java.util.concurrent.Executor;

import org.apache.tomcat.util.threads.ThreadPoolExecutor;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import lombok.extern.slf4j.Slf4j;

@Configuration
@EnableAsync
@Slf4j
public class ThreadConfig implements AsyncConfigurer {

	@Override
	public Executor getAsyncExecutor() {
		// 自定义线程池
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		// 核心线程数
		executor.setCorePoolSize(10);
		// 最大线程数
		executor.setMaxPoolSize(30);
		// 线程队列最大线程数
		executor.setQueueCapacity(1000);
		// 初始化线程池
		executor.initialize();

		return executor;
	}

	@Bean(name = "asyncServiceExecutor")
	public Executor asyncServiceExecutor() {
		log.info("start asyncServiceExecutor");
		ThreadPoolTaskExecutor executor = new VisiableThreadPoolTaskExecutor();
		// 配置核心线程数
		executor.setCorePoolSize(10);
		// 配置最大线程数
		executor.setMaxPoolSize(30);
		// 配置队列大小
		executor.setQueueCapacity(1000);
		// 配置线程池中的线程的名称前缀
		executor.setThreadNamePrefix("mindrive");

		// rejection-policy：当pool已经达到max size的时候，如何处理新任务
		// CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		// 执行初始化
		executor.initialize();
		return executor;
	}

	@Override
	public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
		return (ex, method, params) -> {
			System.out.println("Error Occurs in async method:" + ex.getMessage());
		};
	}

}
